Dodge Nitro. Manual - part 161

No  

Test Complete.  

C101F-RIGHT FRONT WHEEL SPEED COMPARATIVE PERFORMANCE 

For complete wiring diagrams refer to SYSTEM WIRING DIAGRAMS article. 

When Monitored: 

With the ignition on. 

Set Condition: 

When the Right Front Wheel Speed Sensor (WSS) reading is different from the readings received from 
the other sensors at a vehicle speed above 40 km/h (25 mph). The Anti-Lock Brake Module compares 
WSS readings from side-to-side on an axle and front-to-rear. 

Diagnostic Test 

1) CHECK FOR DTC C101F-RIGHT FRONT WHEEL SPEED COMPARATIVE 
PERFORMANCE 

Turn the ignition on. 

With the scan tool, record and erase DTCs. 

Road test the vehicle over 40 km/h (25 mph). 

With the scan tool, read DTCs. 

Possible Causes 

RIGHT FRONT WSS LOOSE - B6, B7 CIRCUITS/CONNECTOR/TERMINAL DAMAGE
IMPROPER RIGHT FRONT TIRE PRESSURE/MISMATCHED TIRES
RIGHT FRONT TONE WHEEL/BEARING DAMAGE
RIGHT FRONT WSS
ANTI-LOCK BRAKE MODULE

NOTE:

This DTC must be active for the results of this test to be valid.

CAUTION: Ensure brake capability is available before road testing.

NOTE:

Vehicle must be driven above 40 km/h (25 mph) for set conditions to be 
met.

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro

  

Does the scan tool display: C101F-RIGHT FRONT WHEEL SPEED COMPARATIVE 
PERFORMANCE active?  

Yes  

Go to 3).  

No  

Go to 2).  

2) CHECK WHEEL SPEED SENSOR SIGNALS 

Turn the ignition on. 

With the scan tool, monitor and graph ALL the WSS speeds and compare graph while an assistant drives 
the vehicle. 

Slowly accelerate as straight as possible from a stop to 40 km/h (25 mph). 

Is the Right Front WSS speed showing 0 km/h (0 mph) or not matching other wheels or showing 
erratic behavior?  

Yes  

Go to 3).  

No  

The condition that caused the symptom is currently not present. Inspect the related wiring for a 
possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.  

Refer to the ABS INTERMITTENT CONDITION.  

3) CHECK FOR IMPROPER RIGHT FRONT TIRE PRESSURE/MISMATCHED TIRES 

Turn the ignition off. 

Check and adjust the Right Front Tire pressure. 

Check and adjust all other tire pressures. 

Inspect for mismatched tires on vehicle. 

Is the Right Front Tire improperly inflated or mismatched tires on vehicle?  

Yes  

NOTE:

If graph shows periodic dropouts pay close attention to the tone wheel.

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro

  

Repair as necessary.  

Perform ABS VERIFICATION TEST.  

No  

Go to 4).  

4) CHECK RIGHT FRONT WSS LOOSENESS, INSPECT B6, B7 CIRCUITS/TERMINALS FOR 
DAMAGE 

Inspect the Anti-Lock Brake Module harness connector, Right Front WSS, and Right Front WSS harness 
connector 

Inspect the Right Front WSS for looseness, excessive corrosion and not properly fastened. 

Inspect the (B6) Right Front WSS Signal and (B7) Right Front WSS Supply circuits between the Right 
Front WSS and Anti-Lock Brake Module for damage. 

Is the Right Front WSS loose or any of the wiring/connectors/terminals damaged?  

Yes  

Repair as necessary.  

Perform ABS VERIFICATION TEST.  

No  

Go to 5).  

5) CHECK RIGHT FRONT WHEEL SPEED SENSOR FOR DAMAGE 

Remove the Right Front Wheel Speed Sensor 

Inspect the Right Front Wheel Speed Sensor face for damage. 

Is the Right Front Wheel Speed Sensor damaged?  

Yes  

Replace sensor and hub assembly.  

Perform ABS VERIFICATION TEST.  

No  

Go to 6).  

NOTE:

Check all terminals for broken, bent, pushed out, or corroded terminals

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro

  

6) CHECK RIGHT FRONT TONE WHEEL/BEARING FOR DAMAGE 

Inspect the Right Front Tone Wheel/Bearing for damage, missing teeth, cracks, corrosion or looseness. 

Is the Right Front Tone Wheel/Bearing damaged?  

Yes  

Repair as necessary.  

Perform ABS VERIFICATION TEST.  

No  

Go to 7).  

7) RIGHT FRONT WHEEL SPEED SENSOR 

Replace the Right Front Wheel Speed Sensor in accordance with the Service Information. 

Perform ABS VERIFICATION TEST.  

Road test the vehicle over 40 km/h (25 mph). 

With the scan tool, read ABS DTCs. 

Did DTC C101F-RIGHT FRONT WHEEL SPEED COMPARATIVE PERFORMANCE reset?  

Yes  

Replace the Anti-Lock Brakes Module in accordance with the Service Information.  

Perform ABS VERIFICATION TEST.  

No  

Test Complete.  

C1020-LEFT REAR WHEEL SPEED SENSOR CIRCUIT 

NOTE:

The Tone Wheel teeth should be perfectly square, not bent, or nicked.

NOTE:

Vehicle must be driven above 40 km/h (25 mph) for set conditions to be 
met.

 

2007 Dodge Nitro R/T 

2007 BRAKES ABS - Electrical Diagnostics - Nitro